Only write if headnode

Author: hgreebe

cookbooks/aws-parallelcluster-environment/templates/cfn_hup_configuration/cfn-hook-update.conf.erb

@@ -2,7 +2,7 @@
 triggers=post.update
 <% case node['cluster']['node_type'] -%>
 <% when 'HeadNode', 'LoginNode' -%>
-path=Resources.<%= @launch_template_resource_id %>.Metadata.AWS::CloudFormation::Init
-action=PATH=/usr/local/bin:/bin:/usr/bin:/opt/aws/bin; . /etc/parallelcluster/pcluster_cookbook_environment.sh; $CFN_BOOTSTRAP_VIRTUALENV_PATH/cfn-init -v --stack <%= @stack_id %> --resource <%= @launch_template_resource_id %> --configsets update --region <%= @region %> --url <%= @cloudformation_url %> --role <%= @cfn_init_role %>;  echo "Update triggered at $(date)" >> <%= @update_dir %>
+  path=Resources.<%= @launch_template_resource_id %>.Metadata.AWS::CloudFormation::Init
+  action=<% if node['cluster']['node_type'] == 'HeadNode' -%>echo "Update triggered at $(date) by <%= node['cluster']['node_type'] %>" >> <%= @update_dir %>; <% end -%>PATH=/usr/local/bin:/bin:/usr/bin:/opt/aws/bin;. /etc/parallelcluster/pcluster_cookbook_environment.sh; $CFN_BOOTSTRAP_VIRTUALENV_PATH/cfn-init -v --stack <%= @stack_id %> --resource <%= @launch_template_resource_id %> --configsets update --region <%= @region %> --url <%= @cloudformation_url %> --role <%= @cfn_init_role %>
 <% end %>
 runas=root